UCC38C44: SLUA274A app note questions

Part Number: UCC38C44 Hi team, I had a few questions regarding the SLUA274A app note in relation to the UCC38C44. In section 2.5, under the equation for the snubber calulcation, equation 13 has a variable labeled "T". What does this refer to, turns ratio? Equations 12, 13, 14 for snubber calc are not the same as in SLUA086 pages 14 and 15. Both give similar capacitor and resistor values but very different resistor power dissipation. The difference between the 2 different equations is in SLUA274A the Rpri-clamp term divides into the entire rest of the equation while in SLUA086 it only divides into the last “V” = N(Vo+Vd) term. Can you tell me which equation is preferred? I appreciate the help! Thanks, AH

Hi AH, T is the switching period. The equation 34 in SLUA086 is right. Regards, Teng